Perhaps you should try some spelling variations:
sach duy » sach dung, sach duoc, sach dat
sach dao » lanh dao
cham duc » pham duc, cham soc, pham duy
hanh dai » hanh tai, hanh dao, vanh dai
sang ma » tang ma, nang ma, sang tao
hieu va » lieu va, hieu qua
va cham » va chat, va tham
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach duy) or (sach dao)) sang ma hoi. hieu va cham duc va hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach duy) OR (sach dao)) sang ma hoi. hieu va cham duc va hanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach duy) or (sach dao)) sang ma hoi. hieu va cham duc va hanh dai cua tre*.